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Home /Doubts and Solutions/CBSE/Class 11 Science/Physics/Waves/Behaviour Of Progressive Waves

Behaviour Of Progressive Waves Free Doubts and Solutions

CBSE - XI Science - Physics - Waves

A wave of wavelength 2m is reflected from a surface. If a node is fromed at 3m from the surface, then at what distance from the surface, another node will be formed?
1. 1m
2. 2m
3. 3m
4. 4m

Asked by Mamali Nanda 14th July 2016, 7:24 PM
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CBSE - XI Science - Physics - Waves

The displacement of particle in wave equation is represented as y = 1.2 sin (120 πt - 0.20x) If this is made to incident on the rigid wall and its amplitude falls to 40% reflection from wall, then what is the equation of reflected wave?

Asked by Topperlearning User 22nd May 2015, 3:32 PM
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CBSE - XI Science - Physics - Waves

State principle of superposition.

Asked by Topperlearning User 22nd May 2015, 3:31 PM
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CBSE - XI Science - Physics - Waves

what are three main effects of superposition of waves

Asked by alexig2020 9th February 2015, 7:52 PM
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CBSE - XI Science - Physics - Waves

AB is a string under tension with one end (say B) connected to a light ring as shown below (in the figure).  The string can move up and down freely through a vertical rod.  An upward kink is reflected back as an upward kink as if there is no opposition at all.  What do you conclude?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XI Science - Physics - Waves

An engine approaches a high vertical wall with constant speed of 90 m/sec.  When it is at a distance of 1050 m from the wall, it blows a whistle, whose echo is heard after 5 second.  Calculate the speed of sound in air.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XI Science - Physics - Waves

A bat emits ultrasonic sound of frequency 100 kHz in air.  If this sound meets a water surface, what is the wavelength of (i)  the reflected sound, (ii)  the transmitted sound?  Speed of sound in air = 340 ms-1 and in water = 1486 ms-1.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XI Science - Physics - Waves

A steel wire has a length of 12.0 m and a mass of 2.10 kg.  What should be the tension in the wire so that the speed of a transverse wave on the wire equals the speed of sound in dry air at 20oC?  Take the speed of sound at 20oC = 343 m/s.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XI Science - Physics - Waves

Show that the velocity of sound increases by 61 cm/s for every 1oC.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XI Science - Physics - Waves

On the basis of Laplace's correction, calculate the velocity of sound in air at N.T.P.

Asked by Topperlearning User 4th June 2014, 1:23 PM
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CBSE - XI Science - Physics - Waves

If the frequency of a tuning fork is 400 Hz and the velocity of sound in air 320 m/s, find how far does the sound travel when the fork executes 30 vibrations?

Asked by Topperlearning User 4th June 2014, 1:23 PM
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